Holley 1940 Rebuild

Squirrelly

Active member
I think I finally figured out my poor gas mileage. I had my local smog guy snif my exhaust and it showed I was running really rich. Should be 2% or less CO but mine was nearly 9%. I am having my Holley 1940 Rebuilt. Anyone have the zero altitude jet size?

Thanks,

Patrick
 
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